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Camshafts

Fits:
Porsche 911/911S 1974-77
Click 'Zoom in' for large parts diagram.
Diagram ref no 32
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
91110514403
The product you are viewing cross references to these numbers
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Fits:
Porsche 911S 1965-73
Porsche 911 Carrera 2.7L 1974-77
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9011051
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Restore accurate valve-train operation and correct compatibility with the mechanical fuel injection system using these OE Match Camshafts for engines equipped with a Mechanical Fuel Injection (MFI) pump.
Material: Steel
Fits:
Porsche 911S 1965-73
Porsche 911 Carrera 2.7L 1974-77
The camshaft is a precision internal engine component responsible for controlling the opening and closing of the intake and exhaust valves. Its carefully designed lobes determine valve lift, duration and timing, ensuring that each valve operates at the correct point in the engine's combustion cycle.
What This Product Does:
- Control the opening and closing of the intake and exhaust valves.
- Are intended for compatible engines fitted with a mechanical fuel injection pump.
- Maintain correct valve timing relative to crankshaft position.
- Determine valve lift through the shape of the cam lobes.
- Determine how long the valves remain open.
- Work with the rocker arms and associated valve-train components.
- Help coordinate engine operation with the requirements of the MFI system.
- Support efficient cylinder filling and exhaust gas evacuation.
- Help maintain consistent combustion and engine performance.
- Influence engine torque, power delivery and throttle response.
- Replace worn, damaged or unsuitable existing camshafts.
- Provide an OE-style solution for compatible Porsche MFI engine rebuilds.
Symptoms Of Wear Or Failure:
- Ticking, tapping or abnormal valve-train noise.
- Reduced engine power or acceleration.
- Poor throttle response.
- Rough or inconsistent engine operation.
- Engine misfires or uneven cylinder performance.
- Difficulty maintaining correct valve clearances.
- Reduced valve lift.
- Flattened or excessively worn cam lobes.
- Pitting, scoring or deterioration of the cam surfaces.
- Abnormal wear on rocker arms or other mating components.
- Excessive wear of the camshaft journals.
- Metallic particles discovered in the engine oil or filter.
- Visible camshaft damage during engine disassembly.
Why Replacement Matters:
- The camshaft determines when and how far the engine's valves open, making its condition fundamental to correct engine breathing and combustion.
- If a cam lobe becomes worn, the corresponding valve may not open as far as intended or may effectively remain open for a shorter period. This can restrict cylinder filling or exhaust flow, resulting in reduced power, rough running and inconsistent performance.
- Correct specification is particularly important on an engine fitted with mechanical fuel injection. The MFI system is mechanically coordinated with engine operation, and the correct camshaft configuration must be used for the intended engine and injection arrangement. An incorrect or unsuitable camshaft can compromise the relationship between valve operation, engine speed and fuel delivery.
- Camshaft deterioration can also damage associated components. Worn or pitted cam surfaces may accelerate rocker-arm wear, while metallic debris produced by deteriorating components can circulate through the engine lubrication system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9011051
The product you are viewing cross references to these numbers
- Porsche 911 1965-1968 2.0L / 912 SWB (F)
- Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
- Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
Precision-Engineered Camshafts – Performance, Reliability, and Power for Porsche Engines
Camshafts are the heartbeat of any Porsche engine, controlling the timing and lift of the intake and exhaust valves to ensure precise combustion and efficient power delivery. A well-tuned camshaft defines how your engine breathes, responds, and performs — whether it’s a daily-driven 911 or a track-focused GT model.
At Design911, we supply a complete range of high-quality and performance-grade camshafts engineered to meet or exceed manufacturer specifications. Each camshaft is precision-machined for exact tolerances, ensuring smooth valve operation, consistent timing, and optimal performance across all driving conditions.
What Do Camshafts Do?
Camshafts regulate how air and fuel enter and exit the combustion chamber. By controlling valve timing, lift, and duration, they play a crucial role in engine power and efficiency.
Core Functions:
- Control
valve timing for optimal engine breathing.
- Determine
power characteristics, from low-end torque to high-rpm performance.
- Synchronise
intake and exhaust cycles for smoother operation.
- Enhance efficiency, combustion stability, and throttle response.
High-performance camshafts are often tuned to deliver sharper throttle response, higher power output, and improved torque delivery for modified or rebuilt engines.
Why Do Camshafts Fail?
Even with Porsche’s engineering excellence, camshafts are
subject to wear over time. Common causes of camshaft failure include:
- Oil
starvation leading to friction and surface wear.
- Excessive
heat or poor lubrication degrading cam lobes.
- Improper
timing belt/chain tension causing misalignment or damage.
- Mechanical
fatigue due to extended mileage or racing conditions.
- Contaminated oil introducing abrasive particles into the valvetrain.
A worn or damaged camshaft can cause loss of power, misfires, rough idle, and reduced engine efficiency — making timely replacement essential to restore peak performance.
Why Replace with Performance-Grade Camshafts?
Replacing worn components with precision-engineered camshafts restores engine reliability and maximises output. Upgraded camshafts can also provide noticeable gains in horsepower and responsiveness.
Key Benefits:
- Restores
valve timing accuracy and smooth engine operation.
- Increases
power and torque, especially in performance-tuned engines.
- Improves
fuel combustion efficiency for cleaner running.
- Ensures
long-term reliability with precision-machined surfaces and premium
materials.
- Perfect fitment with no modification required on compatible Porsche engines.
Whether maintaining a classic flat-six or upgrading a modern turbocharged engine, these camshafts are designed to deliver manufacturer-level precision with motorsport-grade durability.
Highlights:
- Precision-engineered
camshafts for Porsche models old and new.
- Enhanced
performance and reliability, meeting manufacturer standards.
- Motorsport-grade
construction ensures durability under extreme loads.
- Improved
airflow and combustion efficiency for optimal power delivery.
- Ideal for restorations, rebuilds, and performance tuning projects.
- Designed for seamless compatibility with Porsche flat-six, turbo, and hybrid engines.